(A) Bulky high-grade NHL in the left parahilar region with prominent FDG uptake. The patient (no. 5) showed CR over a follow-up period of 15 months. (B) Extensive mediastinal tumor mass of a high-grade NHL with an additional focal tumor lesion in the right lower lobe. The patient (no. 6) exhibited partial remission at day 42, but relapsed during the third course of chemotherapy. Myocardial FDG uptake at day 7 and day 42 does not reflect tumor involvement.